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Chemija / Chemistry

ISSN 0235-7216
ISSN 2424-4538 (online)

2012 m. Nr. 4

Treatment of water-based wood paint wastewater with Fenton process
Tomas VENGRIS, Rima BINKIENĖ, Rita BUTKIENĖ, Romas RAGAUSKAS, Arvydas STONČIUS, Levonas MANUSADŽIANAS

Fenton oxidation process for decontamination of water-based wood paint effluent was performed. The amounts of identified organic compounds present in the effluent, such as 1-butoxy-2-propanol, dipropylene glycol monomethyl ether (mixture of isomers), 2-hydroxy-2-methylpropiophenone and 2-butoxyethanol, were reduced by 96% and the total chemical oxygen demand (COD) by ~80%, whereas the initial COD was ~16,000 mgO2/l. Considering oxidation kinetics, ultimate COD removal and peroxide consumption, 1.0 M H2O2 and 0.01 M Fe(II) Fenton concentrations at 50 °C were admitted as optimal. To evaluate the effluent toxicity, the following three toxicity tests were performed: Charatox (electrophysiological algal test), Daphtoxkit FTM magna and Thamnotoxkit FTM. Toxicological data confirmed the decrease of adverse effects of water-based wood paint effluent on water biota after the treatment by the Fenton-advanced oxidation process.

Keywords: Fenton’s process, paint wastewater, chemical oxygen demand, toxicity

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